S&S Cycle HP103G Gear Drive Camshaft Kit

• Comes with camshafts and inner and outer gears, this is a complete kit

• Fuel injection tuning required.

• Pinion shaft run-out must be checked before installing S&S Cycle gear drive cams.

• A hydraulic press and other professional tools are required to installS&S Cycle gear drive cams. Additionally, material must be removed from the inner surface of the stock gearcover. The stock crankcase may require clearancing for S&S Cycle .625″, .640″, and .675″ lift cams.

• S&S Cycle recommends that gear drive cams be installed by a professional mechanic.

• Due to the inheraent characteristics of gear drives, you may experience more valve train noise with gear driven cams.

• Oversized and undersized gears are available to help achieve correct gear lash.

• S&S Cycle have found that with 160 lb. of valve seat force, the S&S Cycle gear drive cams will perform well up to 6200 rpm. If higher rpm is anticipated, valve springs that provide higher seat force should be used.

• Camshafts that exceed the limits of the stock valve springs require the use of special high lift springs. Most S&S cams have higher lift than stock and are designed to take advantage of the extra flow of ported stock heads or S&S Cycle Super Stock heads.

• Due to the high lift of these cams,S&S Cycle adjustable pushrods are recommended.

• To get the best performance from a performance cam installation, a high flow intake and exhaust system is also recommended.

• Quick installation and Easy Start Cams allow stock starter to start any engine.

• Kit contains cams, gearcover gasket, cam bearings, and instructions.

• 1999-2004 stock springs will handle camshafts with lift up to 0.510″. If a camshaft with higher lift is installed, high performance valve springs capable of handling a greater lift must be used.

• 2005-up stock valve springs will handle camshafts with lift up to 0.585″. If a camshaft with higher lift is installed, high performance valve springs capable of handling a greater lift must be used. Cams with over 0.585″ of lift will cause interference between the valve spring top collar and the valve seal with stock cylinder heads.

• Installation of S&S chain drive cams requires special tools. Attempting the cam change operation without these tools will be difficult. Damage can result which will not be covered under warranty

• HP103 Camshafts are designed as bolt in cams for engines with 103 and stock 9.7:1 compression up to 10.5:1. Works well with stock, un-ported heads, but is great for S&S CNC ported heads. Best power in the higher rpm range, 3000-6000 rpm. Bolt-in.